Armature group for mosaic printing head and related manufacturin

Details Armature group for mosaic printing head and related manufacturin Armature group for mosaic printing head and related manufacturin

1986-03-18

1987-03-10

Pearson, Charles A.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 312

Patent

active

046487301

ABSTRACT:
An armature group for mosaic printing head has a plurality of armatures wherein each armature which is part of an actuation electromagnet associated with one of a plurality of printing needles, is fixed to an elastic arm of a spring steel spider having as many arms as there are armatures. The spider, besides performing an armature positioning function allows the armature group to be handled as a unitary element which is easy to assemble. The thrust arm of each armature further has a double bend so that the plane between such arm and the corresponding needle head is perpendicular to the axis of the needle and passes through the fulcrum of the armature. This minimizes the buckling force which the needle has to undergo during the actuation phase. The construction of the armature group can be accomplished by a completely automated manufacturing process.

REFERENCES:
patent: 3164758 (1965-01-01), Siefert
patent: 3828908 (1974-08-01), Schneider
patent: 4140406 (1979-02-01), Wolf et al.
patent: 4252449 (1981-02-01), Miyazawa et al.
patent: 4423969 (1984-01-01), Kobryn
patent: 4433926 (1984-02-01), Isobe et al.
patent: 4531848 (1985-07-01), Sanders, Jr. et al.
patent: 4572070 (1986-02-01), Moulin
Machinery's Handbook, Industrial Press NY, NY 20th ed., 1978 by Oberg et al, pp. 503-504, 2206.

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